Regional Blood Flow in the Upper Extremity during and after Exposure to Acute Normobaric Hypoxia
| Autor: | S. G. Krivoshchekov, T. G. Komlyagina, V. E. Divert |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Normobaric hypoxia
medicine.medical_specialty Physiology business.industry Blood flow Peripheral Surgery medicine.anatomical_structure Acute hypoxia Forearm Physiology (medical) Internal medicine medicine Breathing Cardiology Hyperemic response business circulatory and respiratory physiology Oxygen saturation (medicine) |
| Zdroj: | Human Physiology. 30:669-673 |
| ISSN: | 0362-1197 |
| DOI: | 10.1023/b:hump.0000049584.03258.62 |
| Popis: | Cardiovascular indices were analyzed in young healthy males exposed to normobaric hypoxia (breathing a gas mixture containing 10% O2 for 16 min). There was a marked variation in individual responses. A linear relationship was observed between the individual blood oxygen saturation at the end of exposure and the baseline muscle blood flow (MBF). Moreover, blood oxygen saturation decreased in subjects with an initially high forearm MBF and remained unchanged or even slightly increased in subjects with a low forearm MBF. After hypoxic exposure (10–15 min), the MBF continued to decrease, venous capacity increased, and postocclusion hyperemic response decreased. It is suggested that hypoxic exposure activates the neuroreflex mechanisms regulating the peripheral blood flow and that the peripheral vascular response to acute hypoxia depends largely on the baseline blood flow in skeletal muscles. |
| Databáze: | OpenAIRE |
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